Bilt hamber, megs & poorboys would be a good place to start. Like others have said already if you ask 10 people.....
Best start with the basics. Decent buckets, wool wash mitt, car shampoo & decent drying towel & some quick detailer to finnish. After that your looking at snow foam lance & snow foam for a pressure washer of choice then when your feeling a little braver, a clay bar kit & possibly a DA polisher etc